I used to collect bus timetables from Newark Penn as a kid, this was back in the flexible metro days so that was an long time ago lol, haven't seen any there in modern times. EDIT: as per the poster above, Newark Penn still does have bus timetables.
I wish NJT had a bus map for downtown philly, they don't have to include the Septa routes just the NJT routes. NJT philly bus operation is confusing to me, like is the 551 a loop in downtown Philly or it terminates and layover somewhere in Philly?